IOTA/IOTA-ES occultation update for (4167) Riemann / TYC 0182-02003-1 event on 2012 Dec 13, 13:01 UT Visible from Hawaii Summary ------- On 2012 Dec 13 UT, the 15 km diameter asteroid (4167) Riemann will occult a 9.2 mag star in the constellation Canis Minor for observers along a path across Hawaii. In the case of an occultation, the combined light of the asteroid and the star will drop by 7.0 mag to 16.2 mag (the magnitude of the asteroid) for at most 1.7 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 15 * date and approx. time of event: 2012 Dec 13, 12:50 - 2012 Dec 13, 13:12 UT * geocentric midpoint of event [JD]: 2456275.04230833 * magnitude of target star: 9.2 * magnitude drop [mag]: 7.0 * estimated maximum duration [s]: 1.7 * Moon: 0 % sunlit, 145° distance * Sun: 142° distance * rough path description: Hawaii The occultation path -------------------- * approximate projected width [km]: 16 * 1 sigma uncertainty interval [path widths]: +/- 4.37 * 1 sigma uncertainty interval [seconds]: +/- 10.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .065 +/- .044) * 1 sigma uncertainty ellipse (major, minor, PA): ( .065", .044", 89° ) * approx speed of asteroid's shadow [km/s]: 9.0429 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0182-02003-1 by 4167 Riemann on 2012 Dec 13 Centre Star Star Sun Path Limits Error Limits E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude 103 0 0 15 52 5 13 12 9 0 87 -36 15 56 21 15 47 49 16 33 40 .. .. .. 104 0 0 15 55 26 13 12 9 1 87 -36 15 59 42 15 51 10 16 37 1 .. .. .. 105 0 0 15 58 48 13 12 9 2 87 -37 16 3 4 15 54 32 16 40 23 .. .. .. 106 0 0 16 2 11 13 12 8 3 88 -38 16 6 27 15 57 56 16 43 47 .. .. .. 107 0 0 16 5 36 13 12 7 4 88 -39 16 9 52 16 1 20 16 47 11 15 24 9 108 0 0 16 9 2 13 12 6 5 88 -40 16 13 17 16 4 46 16 50 37 15 27 35 109 0 0 16 12 28 13 12 5 6 88 -41 16 16 44 16 8 13 16 54 4 15 31 2 110 0 0 16 15 56 13 12 4 7 89 -42 16 20 12 16 11 40 16 57 32 15 34 29 111 0 0 16 19 24 13 12 2 8 89 -43 16 23 40 16 15 9 17 1 0 15 37 58 112 0 0 16 22 54 13 12 1 9 89 -44 16 27 10 16 18 38 17 4 30 15 41 27 113 0 0 16 26 24 13 11 59 10 90 -45 16 30 40 16 22 8 17 8 0 15 44 57 114 0 0 16 29 55 13 11 57 11 90 -46 16 34 11 16 25 39 17 11 31 15 48 28 115 0 0 16 33 27 13 11 54 11 90 -47 16 37 42 16 29 11 17 15 2 15 52 0 116 0 0 16 36 59 13 11 52 12 90 -48 16 41 15 16 32 43 17 18 35 15 55 32 117 0 0 16 40 31 13 11 49 13 91 -49 16 44 47 16 36 16 17 22 7 15 59 5 118 0 0 16 44 5 13 11 46 14 91 -49 16 48 20 16 39 49 17 25 40 16 2 38 119 0 0 16 47 38 13 11 43 15 91 -50 16 51 54 16 43 22 17 29 14 16 6 11 120 0 0 16 51 12 13 11 40 16 92 -51 16 55 28 16 46 56 17 32 48 16 9 45 121 0 0 16 54 46 13 11 36 17 92 -52 16 59 2 16 50 30 17 36 22 16 13 19 122 0 0 16 58 20 13 11 32 18 92 -53 17 2 36 16 54 5 17 39 56 16 16 53 123 0 0 17 1 55 13 11 28 19 93 -54 17 6 11 16 57 39 17 43 31 16 20 28 124 0 0 17 5 29 13 11 24 20 93 -55 17 9 45 17 1 13 17 47 5 16 24 2 125 0 0 17 9 4 13 11 20 21 93 -56 17 13 20 17 4 48 17 50 40 16 27 37 126 0 0 17 12 38 13 11 16 22 94 -57 17 16 54 17 8 22 17 54 14 16 31 11 127 0 0 17 16 13 13 11 11 23 94 -58 17 20 28 17 11 57 17 57 48 16 34 46 128 0 0 17 19 47 13 11 6 24 94 -59 17 24 3 17 15 31 18 1 23 16 38 20 129 0 0 17 23 21 13 11 1 25 95 -60 17 27 36 17 19 5 18 4 57 16 41 54 130 0 0 17 26 54 13 10 56 26 95 -60 17 31 10 17 22 38 18 8 30 16 45 27 131 0 0 17 30 27 13 10 51 26 95 -61 17 34 43 17 26 12 18 12 3 16 49 1 132 0 0 17 34 0 13 10 46 27 96 -62 17 38 16 17 29 45 18 15 36 16 52 33 133 0 0 17 37 33 13 10 40 28 96 -63 17 41 49 17 33 17 18 19 9 16 56 6 134 0 0 17 41 5 13 10 34 29 96 -64 17 45 20 17 36 49 18 22 41 16 59 38 135 0 0 17 44 36 13 10 28 30 97 -65 17 48 52 17 40 20 18 26 12 17 3 9 136 0 0 17 48 6 13 10 22 31 97 -66 17 52 22 17 43 51 18 29 42 17 6 40 137 0 0 17 51 36 13 10 16 32 98 -67 17 55 52 17 47 21 18 33 12 17 10 9 138 0 0 17 55 5 13 10 9 33 98 -68 17 59 21 17 50 50 18 36 41 17 13 39 139 0 0 17 58 34 13 10 3 34 98 -69 18 2 49 17 54 18 18 40 10 17 17 7 140 0 0 18 2 1 13 9 56 35 99 -70 18 6 17 17 57 45 18 43 37 17 20 34 141 0 0 18 5 27 13 9 49 36 99 -70 18 9 43 18 1 12 18 47 3 17 24 1 142 0 0 18 8 53 13 9 42 37 100 -71 18 13 9 18 4 37 18 50 29 17 27 26 143 0 0 18 12 17 13 9 35 37 100 -72 18 16 33 18 8 2 18 53 53 17 30 51 144 0 0 18 15 41 13 9 28 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26 -159 0 0 20 34 1 13 0 3 72 194 -55 20 38 17 20 29 46 21 15 34 19 52 37 -158 0 0 20 35 8 12 59 52 72 197 -54 20 39 24 20 30 53 21 16 42 19 53 44 -157 0 0 20 36 13 12 59 41 72 199 -53 20 40 28 20 31 57 21 17 46 19 54 49 -156 0 0 20 37 14 12 59 30 71 202 -53 20 41 29 20 32 58 21 18 47 19 55 50 -155 0 0 20 38 11 12 59 19 71 205 -52 20 42 27 20 33 56 21 19 44 19 56 47 -154 0 0 20 39 6 12 59 9 71 208 -51 20 43 21 20 34 50 21 20 39 19 57 42 -153 0 0 20 39 57 12 58 58 70 210 -50 20 44 12 20 35 41 21 21 30 19 58 33 -152 0 0 20 40 45 12 58 47 70 213 -49 20 45 0 20 36 29 21 22 18 19 59 21 -151 0 0 20 41 29 12 58 36 69 215 -48 20 45 45 20 37 14 21 23 2 20 0 5 -150 0 0 20 42 10 12 58 25 69 217 -47 20 46 26 20 37 55 21 23 43 20 0 47 -149 0 0 20 42 48 12 58 15 68 219 -47 20 47 4 20 38 33 21 24 21 20 1 25 -148 0 0 20 43 23 12 58 4 67 221 -46 20 47 38 20 39 8 21 24 56 20 1 59 -147 0 0 20 43 54 12 57 53 67 223 -45 20 48 10 20 39 39 21 25 27 20 2 30 -146 0 0 20 44 22 12 57 43 66 225 -44 20 48 37 20 40 7 21 25 55 20 2 58 -145 0 0 20 44 46 12 57 32 66 227 -43 20 49 2 20 40 31 21 26 19 20 3 23 -144 0 0 20 45 8 12 57 22 65 228 -42 20 49 23 20 40 52 21 26 40 20 3 44 -143 0 0 20 45 25 12 57 11 64 230 -41 20 49 41 20 41 10 21 26 58 20 4 2 -142 0 0 20 45 40 12 57 1 64 231 -40 20 49 55 20 41 24 21 27 12 20 4 16 -141 0 0 20 45 51 12 56 51 63 233 -40 20 50 6 20 41 35 21 27 23 20 4 27 -140 0 0 20 45 58 12 56 41 62 234 -39 20 50 14 20 41 43 21 27 31 20 4 35 -139 0 0 20 46 2 12 56 30 61 235 -38 20 50 18 20 41 47 21 27 35 20 4 39 -138 0 0 20 46 3 12 56 20 61 237 -37 20 50 18 20 41 47 21 27 35 20 4 39 -137 0 0 20 46 0 12 56 10 60 238 -36 20 50 16 20 41 45 21 27 33 20 4 37 -136 0 0 20 45 54 12 56 0 59 239 -35 20 50 9 20 41 39 21 27 27 20 4 30 -135 0 0 20 45 44 12 55 50 58 240 -34 20 50 0 20 41 29 21 27 17 20 4 21 -134 0 0 20 45 31 12 55 41 58 241 -33 20 49 47 20 41 16 21 27 4 20 4 8 -133 0 0 20 45 15 12 55 31 57 242 -33 20 49 30 20 41 0 21 26 48 20 3 52 -132 0 0 20 44 55 12 55 21 56 243 -32 20 49 11 20 40 40 21 26 28 20 3 32 -131 0 0 20 44 32 12 55 12 55 244 -31 20 48 47 20 40 16 21 26 4 20 3 8 -130 0 0 20 44 5 12 55 2 54 245 -30 20 48 21 20 39 50 21 25 38 20 2 42 -129 0 0 20 43 35 12 54 53 54 246 -29 20 47 51 20 39 20 21 25 8 20 2 12 -128 0 0 20 43 2 12 54 43 53 247 -28 20 47 17 20 38 46 21 24 34 20 1 38 -127 0 0 20 42 25 12 54 34 52 247 -27 20 46 40 20 38 9 21 23 57 20 1 1 -126 0 0 20 41 44 12 54 25 51 248 -27 20 46 0 20 37 29 21 23 17 20 0 21 -125 0 0 20 41 1 12 54 16 50 249 -26 20 45 16 20 36 45 21 22 33 19 59 37 -124 0 0 20 40 13 12 54 7 49 250 -25 20 44 29 20 35 58 21 21 46 19 58 50 -123 0 0 20 39 23 12 53 59 49 250 -24 20 43 38 20 35 7 21 20 55 19 57 59 -122 0 0 20 38 29 12 53 50 48 251 -23 20 42 44 20 34 14 21 20 2 19 57 5 -121 0 0 20 37 32 12 53 41 47 252 -22 20 41 47 20 33 16 21 19 4 19 56 8 -120 0 0 20 36 31 12 53 33 46 252 -21 20 40 47 20 32 16 21 18 4 19 55 8 -119 0 0 20 35 27 12 53 25 45 253 -20 20 39 43 20 31 12 21 17 0 19 54 4 -118 0 0 20 34 20 12 53 16 44 254 -20 20 38 35 20 30 4 21 15 52 19 52 56 -117 0 0 20 33 9 12 53 8 43 254 -19 20 37 25 20 28 54 21 14 42 19 51 45 -116 0 0 20 31 55 12 53 0 43 255 -18 20 36 11 20 27 40 21 13 28 19 50 31 -115 0 0 20 30 38 12 52 52 42 255 -17 20 34 53 20 26 22 21 12 11 19 49 14 -114 0 0 20 29 17 12 52 45 41 256 -16 20 33 33 20 25 2 21 10 50 19 47 54 -113 0 0 20 27 53 12 52 37 40 256 -15 20 32 9 20 23 38 21 9 26 19 46 30 -112 0 0 20 26 26 12 52 30 39 257 -14 20 30 42 20 22 11 21 7 59 19 45 3 -111 0 0 20 24 56 12 52 22 38 257 -14 20 29 11 20 20 40 21 6 29 19 43 32 -110 0 0 20 23 22 12 52 15 37 258 -13 20 27 38 20 19 7 21 4 55 19 41 59 -109 0 0 20 21 45 12 52 8 36 258 -12 20 26 1 20 17 30 21 3 18 19 40 22 -108 0 0 20 20 5 12 52 1 36 259 -11 20 24 21 20 15 50 21 1 38 19 38 42 -107 0 0 20 18 22 12 51 54 35 259 -10 20 22 38 20 14 7 20 59 55 19 36 58 -106 0 0 20 16 36 12 51 48 34 260 -9 20 20 52 20 12 21 20 58 9 19 35 12 -105 0 0 20 14 47 12 51 41 33 260 -8 20 19 2 20 10 31 20 56 20 19 33 23 -104 0 0 20 12 54 12 51 35 32 261 -8 20 17 10 20 8 39 20 54 27 19 31 30 -103 0 0 20 10 59 12 51 29 31 261 -7 20 15 14 20 6 43 20 52 32 19 29 34 -102 0 0 20 9 0 12 51 23 30 262 -6 20 13 15 20 4 44 20 50 33 19 27 36 -101 0 0 20 6 58 12 51 17 29 262 -5 20 11 14 20 2 43 20 48 31 19 25 34 -100 0 0 20 4 53 12 51 11 28 263 -4 20 9 9 20 0 38 20 46 27 19 23 29 - 99 0 0 20 2 46 12 51 6 27 263 -3 20 7 1 19 58 30 20 44 19 19 21 22 - 98 0 0 20 0 35 12 51 0 27 263 -2 20 4 51 19 56 20 20 42 9 19 19 11 - 97 0 0 19 58 22 12 50 55 26 264 -2 20 2 37 19 54 6 20 39 55 19 16 57 - 96 0 0 19 56 5 12 50 50 25 264 -1 20 0 21 19 51 50 20 37 39 19 14 41 Uncertainty in time = +/- 10 secs Prediction of 2012 Dec 3.0 Data for the target star ------------------------ * name: TYC 0182-02003-1 * constellation : Canis Minor * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 37 26.3577 DE: +03 11 36.854 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .022 ) * V mag [mag]: 9.2 * B mag [mag]: 10.3 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4167) Riemann approx. diameter [km]: 15 approx. diameter ["]: .010 distance from Earth [AU]: 1.97600 * orbital information: orbit source: Preston date of fit: 2012 Jul 10 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 930 number of rejected observations: 12 time covered by the observations: 1978 Oct 08 - 2012 Jan 27 1 sigma uncertainty ellipse (major, minor, PA): 0.061, 0.038, 89° remarks: * orbital elements for (4167) Riemann : Mean anomaly = 189.60014403 deg Arg. of pericenter = 114.62533694 deg Long. of node = 160.59519480 deg Inclination = 14.99324616 deg Eccentricity = 0.09175481 Semimajor axis = 2.58338021 AU Perihelion dist = 2.34634265 AU Mag: H = 11.69, G = 0.15 Epoch of elements : MJD 56274.54300000 TDT (2012 Dec 13.543) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 13 4167 Riemann 13h 0.9m UT 9.2 7 37 26.358 3 11 36.85TYC 0182-02003-1 10.3 16.2 15 1.7 1.976 -1.518 -0.54 -163.4883 3.194 -16.62 -23.19 13.0154 -0.00720 0.29523 -5.10256 -0.12424 -0.00303 0.00210 2000 188.521783201212 9.00000114.625337160.595195 14.9932460.09175481 2.5833802 2.346342611.7 5.00.15 RATE 2.3736760 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.065 0.044 89 5.37 0.046 0 0-3 4 056264.0020121213_2003-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Jul 10, 05:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org